From 4ff4d86f6cceb6bea583bdb230e5439655778cce Mon Sep 17 00:00:00 2001 From: Kory Maincent Date: Mon, 19 May 2025 10:45:05 +0200 Subject: [PATCH] net: Add support for providing the PTP hardware source in tsinfo Multi-PTP source support within a network topology has been merged, but the hardware timestamp source is not yet exposed to users. Currently, users only see the PTP index, which does not indicate whether the timestamp comes from a PHY or a MAC. Add support for reporting the hwtstamp source using a hwtstamp-source field, alongside hwtstamp-phyindex, to describe the origin of the hardware timestamp. Remove HWTSTAMP_SOURCE_UNSPEC enum value as it is not used at all. Signed-off-by: Kory Maincent Link: https://patch.msgid.link/20250519-feature_ptp_source-v4-1-5d10e19a0265@bootlin.com Signed-off-by: Paolo Abeni --- Documentation/netlink/specs/ethtool.yaml | 27 +++++++++++++++++ include/linux/ethtool.h | 5 ++++ include/linux/net_tstamp.h | 7 +---- .../uapi/linux/ethtool_netlink_generated.h | 14 +++++++++ net/ethtool/common.c | 29 +++++++++++++++---- net/ethtool/tsinfo.c | 23 +++++++++++++++ 6 files changed, 94 insertions(+), 11 deletions(-) diff --git a/Documentation/netlink/specs/ethtool.yaml b/Documentation/netlink/specs/ethtool.yaml index c650cd3dcb80..9f98715a6512 100644 --- a/Documentation/netlink/specs/ethtool.yaml +++ b/Documentation/netlink/specs/ethtool.yaml @@ -98,6 +98,24 @@ definitions: name: tcp-data-split type: enum entries: [ unknown, disabled, enabled ] + - + name: hwtstamp-source + doc: Source of the hardware timestamp + enum-name: hwtstamp-source + name-prefix: hwtstamp-source- + type: enum + entries: + - + name: netdev + doc: | + Hardware timestamp comes from a MAC or a device + which has MAC and PHY integrated + value: 1 + - + name: phylib + doc: | + Hardware timestamp comes from one PHY device + of the network topology attribute-sets: - @@ -896,6 +914,13 @@ attribute-sets: name: hwtstamp-provider type: nest nested-attributes: ts-hwtstamp-provider + - + name: hwtstamp-source + type: u32 + enum: hwtstamp-source + - + name: hwtstamp-phyindex + type: u32 - name: cable-result attr-cnt-name: __ethtool-a-cable-result-cnt @@ -1981,6 +2006,8 @@ operations: - phc-index - stats - hwtstamp-provider + - hwtstamp-source + - hwtstamp-phyindex dump: *tsinfo-get-op - name: cable-test-act diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h index 117718c24814..5e0dd333ad1f 100644 --- a/include/linux/ethtool.h +++ b/include/linux/ethtool.h @@ -19,6 +19,7 @@ #include #include #include +#include #include #define ETHTOOL_MM_MAX_VERIFY_TIME_MS 128 @@ -830,6 +831,8 @@ struct ethtool_rxfh_param { * @so_timestamping: bit mask of the sum of the supported SO_TIMESTAMPING flags * @phc_index: device index of the associated PHC, or -1 if there is none * @phc_qualifier: qualifier of the associated PHC + * @phc_source: source device of the associated PHC + * @phc_phyindex: index of PHY device source of the associated PHC * @tx_types: bit mask of the supported hwtstamp_tx_types enumeration values * @rx_filters: bit mask of the supported hwtstamp_rx_filters enumeration values */ @@ -838,6 +841,8 @@ struct kernel_ethtool_ts_info { u32 so_timestamping; int phc_index; enum hwtstamp_provider_qualifier phc_qualifier; + enum hwtstamp_source phc_source; + int phc_phyindex; enum hwtstamp_tx_types tx_types; enum hwtstamp_rx_filters rx_filters; }; diff --git a/include/linux/net_tstamp.h b/include/linux/net_tstamp.h index ff0758e88ea1..f4936d9c2b3c 100644 --- a/include/linux/net_tstamp.h +++ b/include/linux/net_tstamp.h @@ -4,6 +4,7 @@ #define _LINUX_NET_TIMESTAMPING_H_ #include +#include #define SOF_TIMESTAMPING_SOFTWARE_MASK (SOF_TIMESTAMPING_RX_SOFTWARE | \ SOF_TIMESTAMPING_TX_SOFTWARE | \ @@ -13,12 +14,6 @@ SOF_TIMESTAMPING_TX_HARDWARE | \ SOF_TIMESTAMPING_RAW_HARDWARE) -enum hwtstamp_source { - HWTSTAMP_SOURCE_UNSPEC, - HWTSTAMP_SOURCE_NETDEV, - HWTSTAMP_SOURCE_PHYLIB, -}; - /** * struct hwtstamp_provider_desc - hwtstamp provider description * diff --git a/include/uapi/linux/ethtool_netlink_generated.h b/include/uapi/linux/ethtool_netlink_generated.h index 30c8dad6214e..9a02f579de22 100644 --- a/include/uapi/linux/ethtool_netlink_generated.h +++ b/include/uapi/linux/ethtool_netlink_generated.h @@ -37,6 +37,18 @@ enum ethtool_tcp_data_split { ETHTOOL_TCP_DATA_SPLIT_ENABLED, }; +/** + * enum hwtstamp_source - Source of the hardware timestamp + * @HWTSTAMP_SOURCE_NETDEV: Hardware timestamp comes from a MAC or a device + * which has MAC and PHY integrated + * @HWTSTAMP_SOURCE_PHYLIB: Hardware timestamp comes from one PHY device of the + * network topology + */ +enum hwtstamp_source { + HWTSTAMP_SOURCE_NETDEV = 1, + HWTSTAMP_SOURCE_PHYLIB, +}; + enum { ETHTOOL_A_HEADER_UNSPEC, ETHTOOL_A_HEADER_DEV_INDEX, @@ -401,6 +413,8 @@ enum { ETHTOOL_A_TSINFO_PHC_INDEX, ETHTOOL_A_TSINFO_STATS, ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER, + ETHTOOL_A_TSINFO_HWTSTAMP_SOURCE, + ETHTOOL_A_TSINFO_HWTSTAMP_PHYINDEX, __ETHTOOL_A_TSINFO_CNT, ETHTOOL_A_TSINFO_MAX = (__ETHTOOL_A_TSINFO_CNT - 1) diff --git a/net/ethtool/common.c b/net/ethtool/common.c index 49bea6b45bd5..eb253e0fd61b 100644 --- a/net/ethtool/common.c +++ b/net/ethtool/common.c @@ -921,9 +921,18 @@ int ethtool_get_ts_info_by_phc(struct net_device *dev, phy = ethtool_phy_get_ts_info_by_phc(dev, info, hwprov_desc); if (IS_ERR(phy)) - err = PTR_ERR(phy); - else - err = 0; + return PTR_ERR(phy); + + /* Report the phc source only if we have a real + * phc source with an index. + */ + if (info->phc_index >= 0) { + info->phc_source = HWTSTAMP_SOURCE_PHYLIB; + info->phc_phyindex = phy->phyindex; + } + err = 0; + } else if (!err && info->phc_index >= 0) { + info->phc_source = HWTSTAMP_SOURCE_NETDEV; } info->so_timestamping |= SOF_TIMESTAMPING_RX_SOFTWARE | @@ -947,10 +956,20 @@ int __ethtool_get_ts_info(struct net_device *dev, ethtool_init_tsinfo(info); if (phy_is_default_hwtstamp(phydev) && - phy_has_tsinfo(phydev)) + phy_has_tsinfo(phydev)) { err = phy_ts_info(phydev, info); - else if (ops->get_ts_info) + /* Report the phc source only if we have a real + * phc source with an index. + */ + if (!err && info->phc_index >= 0) { + info->phc_source = HWTSTAMP_SOURCE_PHYLIB; + info->phc_phyindex = phydev->phyindex; + } + } else if (ops->get_ts_info) { err = ops->get_ts_info(dev, info); + if (!err && info->phc_index >= 0) + info->phc_source = HWTSTAMP_SOURCE_NETDEV; + } info->so_timestamping |= SOF_TIMESTAMPING_RX_SOFTWARE | SOF_TIMESTAMPING_SOFTWARE; diff --git a/net/ethtool/tsinfo.c b/net/ethtool/tsinfo.c index 8130b406ef10..8c654caa6805 100644 --- a/net/ethtool/tsinfo.c +++ b/net/ethtool/tsinfo.c @@ -160,6 +160,12 @@ static int tsinfo_reply_size(const struct ethnl_req_info *req_base, /* _TSINFO_HWTSTAMP_PROVIDER */ len += nla_total_size(0) + 2 * nla_total_size(sizeof(u32)); } + if (ts_info->phc_source) { + len += nla_total_size(sizeof(u32)); /* _TSINFO_HWTSTAMP_SOURCE */ + if (ts_info->phc_phyindex) + /* _TSINFO_HWTSTAMP_PHYINDEX */ + len += nla_total_size(sizeof(u32)); + } if (req_base->flags & ETHTOOL_FLAG_STATS) len += nla_total_size(0) + /* _TSINFO_STATS */ nla_total_size_64bit(sizeof(u64)) * ETHTOOL_TS_STAT_CNT; @@ -259,6 +265,16 @@ static int tsinfo_fill_reply(struct sk_buff *skb, nla_nest_end(skb, nest); } + if (ts_info->phc_source) { + if (nla_put_u32(skb, ETHTOOL_A_TSINFO_HWTSTAMP_SOURCE, + ts_info->phc_source)) + return -EMSGSIZE; + + if (ts_info->phc_phyindex && + nla_put_u32(skb, ETHTOOL_A_TSINFO_HWTSTAMP_PHYINDEX, + ts_info->phc_phyindex)) + return -EMSGSIZE; + } if (req_base->flags & ETHTOOL_FLAG_STATS && tsinfo_put_stats(skb, &data->stats)) return -EMSGSIZE; @@ -346,6 +362,11 @@ static int ethnl_tsinfo_dump_one_phydev(struct sk_buff *skb, if (ret < 0) goto err; + if (reply_data->ts_info.phc_index >= 0) { + reply_data->ts_info.phc_source = HWTSTAMP_SOURCE_PHYLIB; + reply_data->ts_info.phc_phyindex = phydev->phyindex; + } + ret = ethnl_tsinfo_end_dump(skb, dev, req_info, reply_data, ehdr); if (ret < 0) goto err; @@ -389,6 +410,8 @@ static int ethnl_tsinfo_dump_one_netdev(struct sk_buff *skb, if (ret < 0) goto err; + if (reply_data->ts_info.phc_index >= 0) + reply_data->ts_info.phc_source = HWTSTAMP_SOURCE_NETDEV; ret = ethnl_tsinfo_end_dump(skb, dev, req_info, reply_data, ehdr); if (ret < 0) -- 2.25.1